Malicious PDF — malware analysis report

Static analysis result for SHA-256 92103c088951e4f1…

MALICIOUS

PDF

107.9 KB Created: 2021-03-20 09:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6f0018d4663bfe8a23b88a4048e987 SHA-1: 7701b896f11b9b01c4390aecb9bde8758a387014 SHA-256: 92103c088951e4f1bc769bd515b2b9cf3ba89c25fd0511e5a1666c5658dbddbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs, such as http://lunesygets.xyz/29170542527t7jhj.pdf, are likely used to host or redirect to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/award?keyword=arbitration+act+2020+malaysia+pdf
    • http://lunesygets.xyz/29170542527t7jhj.pdf
    • https://cdn.sqhk.co/vusutazomaga/gghiSjg/grid_autosport_mod_android_download.pdf
    • https://cdn.sqhk.co/foxenikap/bjfrqic/hollywood_studios_the_movie_tycoon_game_mod_apk.pdf
    • https://cdn.sqhk.co/vugomupuzisa/chjARUn/81571040720.pdf
    • http://ourfutures.space/mugebe78rzv.pdf
    • https://nazigexasuv.weebly.com/uploads/1/3/6/0/136081917/685fcf5c48f9c.pdf
    • https://cdn.sqhk.co/naxaroja/YXQQ8hh/zekipomajireguli.pdf
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/9868517.pdf
    • https://sagejajake.weebly.com/uploads/1/3/5/3/135303377/kadof.pdf
    • https://sejoxamopizava.weebly.com/uploads/1/3/1/8/131858661/tirib.pdf
    • https://lefusovu.weebly.com/uploads/1/3/4/0/134040443/6261445.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mitazojumate.epizy.com/78607914516.pdf
    • http://vekemifapujev.rf.gd/muzipigudonesikofu.pdf
    • http://vowukuzu.rf.gd/rowiwozoved.pdf
    • http://relixaweb.rf.gd/kali_linux_wifi_hacking_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/eaa64ace-4f42-4472-8b67-149530cb3308/how_to_implement_lean_manufacturing_book.pdf
    • https://uploads.strikinglycdn.com/files/e18c7e9a-9019-4a70-9a95-47af13eb5564/speed_queen_tumble_dryer_parts.pdf
    • http://ketolunumakomez.rf.gd/fojufitawirenizit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a1e.bin
ae4ea92552e56da8650ce1f881d40c85f91447c5384ccf95efacbd0d5f9f5bff
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A1E 5804 bytes
font_01_sfnt_off00017dd3.bin
b9953d0825d7e5671a6272ac1ce13768346fcdd7996c5cf0b9f280303cad59e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DD3 10600 bytes